Final answer:
To increase the volume on a cellular phone, adjust the volume control which amplifies the sound waves. Doubling the volume on a CD player increases the vibrations felt. A sound twice as intense as another is about 3 dB higher in sound level.
Step-by-step explanation:
Understanding Sound Volume Increase on Cellular Phones
To increase the volume on a cellular phone, one typically adjusts the volume control either using the physical buttons on the phone or via the sound settings in the phone's operating system. The process might involve increasing the level of electrical signals, which in turn amplifies the sound waves produced by the phone's speakers.
When conducting an investigation to feel sound, such as in a lab experiment with a CD player and rock music, one can start by placing the player on a light table and playing the music at a volume that just causes the table to vibrate. By increasing the volume control to double its reading, the intensity of these vibrations will also increase. This illustrates the correlation between volume levels and vibration intensity, as increased volume results in increased energy of the sound waves, causing the table to vibrate more noticeably.
Additionally, one could explore changing sound intensity levels and show that a sound which is twice as intense as another will have a sound level that is approximately 3 dB higher. This concept is important in understanding sound and its properties.